1. The dimension of Pressure is:
* ML-1T-2 * M1L-2T-3 * ML2T-1 * MLT-1
2. The products
of two numbers 5.642 and 4.71 in the prospective significant number are:
*26.57382 * 26.574 * 26.6 * 26.5738
3. The unit of
Luminous intensity is:
*Decibel *Candela *Dioptre *w/m2
4. The value of
'g' for an object falling on any planet is independent of which of the
following quantities:
* Mass of planet * Radius of planet * Mass of falling object * all
of these
5. In the
terrestrial telescope, the central lens is used to:
*erect the image *increase magnifying power
*both of these *none of
these
6. The Noble price in Physics was awarded to
this Pakistani Scientist:
*Dr. Abdul Qadeer Khan *Dr. Saleem uz
Zaman Siddiqui
*Dr. Abdus Salam *Dr.
Samar Mubarak
7. The
dimensions of angular momentum are:
* M2L2T2 * M2L2T * ML2T * ML2T-1
8. The book
“Kitab-ul-Qanoon-ul Masoodi” was written by:
* Ibn-e-Sina * Al-Razi * Abu-Rehan Al-Beruni
* Ibn-al-Haitham
9. Written of
the flowing physical quantity will be different units as compared to that of
others:
* Weight *Tension
* Buoyant Force *
Electromotive Force
10. The angle
between centripetal and tangential acceleration in circular motion is:
*180° * zero * 90° *45°
11. During the projectile motion the
acceleration of the projectile along the horizontal direction will:
*Decrease * Increase *be zero * remain constant
12. If A .B =0,
A ×B =0 and A≠0 then B is:
*equal to A *
Zero *Perpendicular
to A *Anti-parallel to A
13. If A =5i+j and B =2k then A - B is equal to:
*5i+j+2k *5i-j-2k *5i+j-2k *-5i-j+2k
14. If A=a i
and B=bj , then A x B is equal to:
*0 * ab k * -ab k * none of these
15. Two perpendicular vectors having magnitudes of 4 units and 3
units are added. There resultant has magnitude of :
*5 units *7 units *12 units *25 units
16. The magnitude of resultant of two forces of magnitudes 2N and
10N cannot be:
* 4N *6N *9N *13N
17. (i x j) .
(j x i) is:
*-1
*k *1 *zero
18. If 'F' be the limiting friction and 'R' the normal reaction.
Then co-efficient of static friction`
'
is:
*
*
*
*
19. If the time interval is very small (
),
the rate of change of velocity of a body is called:
*Average
acceleration *acceleration
*instantaneous
acceleration *constant acceleration
20. An
object is falling through a viscous fluid with terminal velocity,its velocity:
*is increasing *is decreasing * remains same * becomes zero
21. The number of lines per cm of a diffraction
grating are 4000, its grating element is:
*2.5 x 10-4 cm *2.5 x10-6
cm *4 x 10-2
cm *4x 10 5cm
22. When Newton’s rings are observed by reflected light , the
centre of rings appear dark due to
*phase reversal
only *path
difference zero only
* intensity of
light being maximum * both phase
reversal and path difference being zero.
23. If F= 3i and d=6j the work done will be:
*zero *2 *9 *18
24. Stokes law
is applicable to the:
*bodies resting
on the surface of liquid
*moving bodies
through the viscous medium
*moving bodies
through the non viscous medium
*moving bodies
through vacuum
25. A body
falls freely .The distance covered by it in 2 sec is:
*9.8 m *19.6
m *39.2 m *100 m
26. The rate of
change of linear momentum is:
*acceleration * torque *force * velocity
27. Kinetic friction is always:
*greater than static friction *Equal to static friction
*less than static friction *zero
28. A
helicopter weighing 3920 N is moving up with a constant speed of 4 m/s. The
force on the helicopter is:
*4720 N * 3920N * 3924 N * 3916N
29. An angle subtended at its centre by an arc whose length is
double to that of its radius is:
*2° *57.3° *80° *114.6°
30. A body, moving along the circumference of a circle, completes
two revolutions. If the radius of circle is R, the ratio of displacement to the
covered path will be:
* zero * πR * 2 πR * 4πR
31. The angular speed of the
minute hand of a clock is:
*
*
*
*
32. The sum and difference of two vectors are equal in
magnitude. The angle between the vectors is:
* 0o *900 *120o * 1800
33. A ball is
dropped from a height of 100m, its acceleration at half of height will be:
* 9.8 m/s2 * 4.9 m/s2 *10 m/s2 * 5 m/s2
34. To produce same acceleration in the bodies of
masses 10 kg and 20 kg the force applied on the second body should be:
*Halved *Equal to that on first body *Doubled *Three times
35. A
projectile is fired at an angle 
with the horizontal will be minimum at:
*the highest
point *the
point of projection
*all points of
its path *the
point of landing on ground
36. The cyclist
cycling around a circular racing track skids because:
*the
centripetal force upon him is less than the limiting friction
* the
centripetal force upon him is greater than the limiting friction
* the
centripetal force upon him is equal to the limiting friction
*none of them
37. The
horizontal range of a projectile depends upon:
* the angle of
projection *
‘g’ at the place
* the velocity
of projection *
all of them
38. The rate of
change of angular momentum is called
*Power * Torque *Momentum *Force
2019
39. The point which describes the motion of the whole system or
body is known as the:
*center of mass *inertia
*centre of
gravity *moment
of inertia
40. The dot
product of force and velocity is called:
*work *power *momentum *energy
41. The dimensions of G/g are:
* M0L-1T-2 * M1L2T-2 * M-1L2T-2 * M-1L2T0
42. Light year is the unit of:
*time *distance *velocity *luminous intensity
43. The number
of significant figure in 1.6 x 10-19 is:
*2 *3 *4 *6
44. A simple
pendulum is performing S.H.M with time period T. If its length is doubled. The
new time period will be:
*2T *0.5T *2.5T * 1.414T
45. Beats are
produced due to:
* diffraction
of waves in time *reflection
of waves in time
*interference
of waves in time *polarization
of waves in time
46. The ratio
of SI unit of angular momentum to linear momentum is:
*J.s *N/J *J.N *J/N
47. The ocean
tides are caused by:
*Earth's gravitational
force only *Moon's
gravitational force only
* Sun's gravitational force
only *Gravitational
force of both the sun and moon
48. If
the velocity of a body is doubled and mass is reduced to one-fourth of its
initial value ,the kinetic energy will be:
*be doubled *four fold * remains same * becomes zero
49. The centre
of mass of a body:
*always
coincides with the centre of gravity
* never coincides
with the centre of gravity
*coincides with
the centre of gravity only in uniform field
*is lower than
the centre of gravity
50. The angular
momentum of a particle changes from 0 to 720 is in 4 sec, the magnitude of
torque acting will be:
*1440J *360J *180J *4.5J
51. The
magnitude of couple depends upon:
*The distance
of F from origin *
The distance of –F from origin
* Distance
between F and –F *
None of these
52. Two forces of equal magnitude but opposite
in direction and not acting on the same line constitute:
*a
couple * power *a circle *a force
53. Torque is maximum when force:
*is parallel to
moment arm *as
anti parallel to moment arm
*makes angle 60
degree with moment arm *
is perpendicular to moment arm
54. The weight
of a man is 600 N at the earth, his weight on the moon, where gm=g/6
will be:
*3600N *600N *300N *100N
55. If the
radius of the earth were to shrink by 1% while its mass remains same, the
acceleration due to gravity on the earth surface would:
* Decrease * Increase *Remain the same *become half
56. The value of the gravitational constant
(G) was first determined experimentally by:
*Newton *Cavendish * Einstein *Maxwell
57.Artificial
gravity in spacecraft can be created by:
*translatory Motion *vibratory Motion *spin motion *orbital motion
58. If man a goes above the earth’s surface to a distance equal to
thrice the earth’s radius, the value of acceleration due to gravity at that
point becomes:
*1/3 g *1/4
g *1/9 g *1/16 g
59. If the mass
of the earth becomes four times large, the value of g will:
* remain unchanged * Becomes four times larger * Be double * sixteen times larger
60. When a lift
is moving upward with a uniform velocity, the apparent weight of a body inside
the lift will be:
* Equal to its actual weight * Less than the actual weight
* More than the actual weight * Zero
61. By using
adjustable aperture of a lens we can reduce the defect of the lens which is
called:
*astigmatism *
spherical aberration
* chromatic
aberration *
none of them
62. Two convex
lenses of same focal length 'f' are combined together. The focal length of the
combines lens is:
*2f *f/2 * 2 + f * 2 – f
63.If a planet existed whose mass and radius were both twice that
of the earth, then acceleration due to gravity
at its surface would be:
*4.9 m/s2 * 19.6 m/s2 *2.45
m/s2 * same as that of earth
64. At what
depth, the weight of the body becomes three fourth, as compared to the body
weight on the surface of earth.
* d=R/2 * d=R/4 * d=2R/3 * d=4R/5
65. It is not a
vector quantity.
*Force *Torque *Frequency *Weight
66. The y-components of vector A =15 units when it
forms an angle of 50° with positive x-axis is:
*9.6 units * -9.6 units * 11.5 units *-11.5 units
67. Work energy
equation is called:
* Law of conservation of mass * Law of conservation
of momentum
* Law of conservation of energy * Law of conservation of
angular momentum
68. One kilo watt hour is equal to:
*3.6 x 106 J *3.3 x 109 J *3.9 x 106 J *3.6 x 109 J
69. The angular
momentum of particle moving in circle is conserved if:
*net torque
acting on particle is zero *the acceleration of particle is
zero
* net angular
displacement of particle is zero *
net force acting on particle is zero
70. A
force of 8 N is applied to the spanner perpendicularly at a distance of 0.15 m
from the centre of nut ,the moment of force acting on the nut is:
*1.2 Nm *1.5 Nm * 2.1 Nm * 3 Nm
71. Both
Kilowatt hour and electron volt are the units of:
*Power *Charge *Energy *Angular momentum
72. Electron
volt is the unit of:
*Power *voltage *energy *charge
73. This one of the following is not the unit of
power:
* horse power * joule/sec *kilowatt hour *foot-pound/sec
74. A bucket of
mass 10 kg is moved downwards in the gravitational field through a distance of
1 m. The work done in this case is equal to:
*10 J * 98 J * -98 J * 0.1 J
75. The unit of
Intensity of sound is:
*watt/m2 * watt-s * watt/s * watt/m
76. The product
of frequency and time period is:
*1 *2 *3 *4
77. Weber
Fechner law is:
*I
α Log L * L α Log I * I α 1/ Log L * I α Log L
78. If the
frequency of fifth harmonic of a vibrating string is 200 Hz ,its fundamental
frequency is:
*5 Hz *25
Hz *40
Hz *100
Hz
79. The range
of audible sound is:
*1 Hz – 10 Hz *20Hz – 20000Hz
*21000Hz – 24000Hz *25000Hz – 50000Hz
80. If the mass
of the bob of a simple pendulum is doubled, its time period will be:
*be doubled *become triple *remain
the same *halved
81. The S.I
unit of intensity level of sound is:
*watt * diopter * sone * decibel
82. Earthquake waves are the example of:
*audio waves *
infrasonic waves
* Ultrasonic
waves *
shock waves
83. Huygen’s
Principle is used to determine:
*speed of light *position of wave front *polarization *refractive index
84. The
equation represents Bragg's law:
*mλ = 2d sinϴ *mλ = d sinϴ *2mλ = d sinϴ *2mλ = 3d sinϴ
85. In compound
microscope, the image formed by objective is:
*Virtual and magnified *Real and magnified
*Real and diminished *Virtual and diminished
86. An
astronomical telescope when focused for infinity with focal length of objective
is 60cm and a focal length of eye piece is 3cm, the length of telescope is:
*63cm *20cm * 57cm * 180cm
87. The
magnifying power of Astronomical telescope is:
* fo+fo *fofe * fo+fe * f-fe
88. The focal length of magnifying glass is equal to the least
distance of the distinct vision. Its angular magnification will be :
* 6 *
5 * 2 * 1
89. In Young's double slits experiment, the
condition for the constructive interference is that the path difference must be
*An odd multiple of the half wavelength
*An odd multiple of the quarter
wavelength
*An integral multiple of the wavelength
*An even multiple of one third the
wavelength
90. The fringe
spacing in Young's double slit experiment is:
* d
/ L *L/d * Ld/ *Ld
91. A weight
lifter consumes 500 J of energy to lift a load in 2 seconds, the power consumed
is:
*125 watt *500 watt *250watt *1000watt
92.When a transverse wave travelling through a rare medium is
reflected from a dense medium, then phase change produced in it will be equal
to:
*0° *90° *180° *360°
93. Polarization
of light due to tourmaline crystals takes place because of:
*Reflection * Absorption *
Refraction * Collision
94. According
to Maxwell theory, light travels in the form of:
*transverse
wave * longitudinal wave * mechanical wave * electromagnetic wave
95. The wave
theory cannot explain:
*polarization * photo electric effect *
interference * diffraction
96. In a
spectrometer, parallel beam of light is obtained by
* Beam Splitter *Collimater * Diffraction
grating *Prism
97. The
magnifying power of a lens of focal length 1/2m is:
*1 dioptre *2 dioptres *50
dioptres *100 dioptres
98. The
distance between the principal focus and the optical center is called:
*Aperture *Focal length *Principal axis *Radius of curvature
99. The unit of
angular velocity is:
*radian/cm * metre/sec * radian/sec * radian/sect
100. One radian
is equal to:
*1o *75.3o *57.3o *0.017o
Sir plz first year k biology k bhi mcqs Kara dein
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